[quote=@Lonewolf685]
The horrifying moment you realize you have a Caster and everyone else has Magic Resistance. 
Whelp, I always did love a challenge, thought I find myself for more empathetic to the plight of Medea. No wonder she had to drain all those civilians.
[/quote]

Magic Resistance only matters if you let it matter. It's easy to get around if you know what you're doing.

[@Zobozun]

So he's a homunculus? What's his defect? They all need defects. Keep in mind that he's not going to be Einzbern-quality.

A homunculus can be designed for either magecraft (Sella), or physical (Leysritt). Which is he? The profile suggests physical, so to what degree?

All homunculi have sucky od. Like, worse than even the lowest human's od.

[quote] His magic code is located where a normal person's navel would be.[/quote]

His what?

Just say the watch is am amplifier for suggestion, remove the part about "attuning energy".

If he knows alchemical theory, why does he not know alchemy?

Also, Alchemy's a very odd Origin, but that's not really something you need to change.

How does the "internal furnace" work? Is it a Mystic Code inside his body, or what?